Electrical Engineering Interview Questions

when we have to use UPF wattmeter and LPF wattmeter? what is the difference between UPF and LPF wattmeter in terms of construction?

1986

when we have to use UPF wattmeter and LPF wattmeter? what is the difference between UPF and LPF wattmeter in terms of construction?

23015

can any one tell me the formula to select the thickness of wire selection according to ampere rating

3816

I want to know the currect formula for industrial lighting lux caluculation & light fittings selection

MRF,

6910

what is the phase voltage and line voltage in 2 phase power supply?

3883

why the protection turbo generators is most complex?

1564

How to calcualte 1unit of current consumption?

21086

why the earth is taken minimum in supplying? wather it the proportional factor to getting work any equipment or a power plant?

1503

A 100 kVA , 400 v/250 kv testing transformer has 8% leakage reactance and resistance on 100 KVA base . A cable has to be tested at 500 kv using the above transformer as a resonant transformer at 50 hz . if the charging current of the cable at 500 kv is 0.4 A find the series inductance required . Assume 2% resistance for the inductor to be used and the connecting leads . Neglect dielectric loss of hte cable . what will be the input voltage to the transformer ?

L&T,

4538

TYPE'S OF BREKAR ,WHAT IS TRANSFORMAR & SAFTY. STARTER DOL & STAR DELTA STARTER.

2147

How to improve the power factor from 0.8 to 0.98? Also tell me cost vs benefit analysis.

3866

If a motor of 30KW rating &200 mtrs distance from feeder give me the cable size selection calculation?

1393

Can we use the Poly Phenly Sulphide instead of Poly Phenly Ether? Do clarify your opinion.

2666

how to calculate current in HT side when we having LT current

7004

Why does capacitor block dc supply?

Bhel,

7740

Un-Answered Questions { Electrical Engineering }

How to use computer cpu ups use for home inverter circuit board

1331

Under wat condition statcom operates as an inductor for the transmission line?

1483

what is the total power generation in india?

1769

how can we calculate the ampacity of the electrical wire/cable. and what are the factors must be considered. pls. elaborate.

1803

how can service sitting be setted for MCCB?Example for sittings IR (CURRENT RATING),IS(CURRENT STARTING)IO (current operating

1968

How many points does a Circuit can have?

1491

what is relation between ct and pt ratio with multiplication factor of a energy meter? is there any other factor on which multification factor depend?

1874

hi all i like to know vat is power plot in control systems also i want to know abt latest trends in electrical & electronics

1510

I want to know Electrical Circuit?

1750

how meger function

2456

What is transformation ratio what it describes?

1219

What is called grain-oriented laminations?

664

how to calculate the battery AH

2297

how the testing of protection CT Testing done through Primary injection kit please describe in detail procedure...

1842

Battery is a voltage source? give one example of current source and why?

1145